Show WET ii 1ThiESli I Like Features in tie Three Great Districts j I ALL ARE NEAR SNAKE RIVER j i the Eastern Side ejf its I J They Arc on Canyon and From Three to Five i Miles Distant Description of the I Surface and of the Formations Granite Contact with Schist QuartzPorphyry Veins Large and j I j I i Continuous Biggest Strike of the I Section Made in the South Peacock j AVcljier Ida Feb 27Tlic making of j I new strikes in the SCVCltl mining his j I trlls of Ihls county caused mining men j In I wonder what is lie I forma I ion so tin t following coming from the must reliable relia-ble source known wIll be of moment There are HOitic I eat urea of the 1 three I districts I Mineral I I lleulh and Seven Devils that are ihe ttumc All are on I I ihe I eastern side of the great Snake j Kiver canyon all have HlopeM of about HO degrees angle from the crest of lie I 1 range lo the rIver and all are about the same distance three to five miles I away In an air line from the t river t their I t baKca touching i it I Together they form a somewhat Interruriled mountain range beginning near Dunllngton and extending northward to the mouth I of the Salmon river und running nearly I I north and soulh All i have highly met amorphosejd and fiofl schist of very ear Jy age as a groundwork on the west and granite on the east all have a mure or less complete basaltic cap which slopes gently I to the eastward bin does not extend westward of Ihe t crest to speak nf forming i the I country i I from Middle I valjey lo the Salmon river und all have I In basalt I underlaid by vast areas of t granite which extend eastward In an almost conlintious i body through Sil mon meadows to the E int St tooth range All have bodies of porphyry ol various I kinds foi mecl as Intruding I I dykes I and which have been at least In I purl tho cause of thr mineralization The lm salt Ic Hows have run eastward in sheets from north and south fissures many miles I I long arising near the crest nf the range and have come out at successive intervals I forming I layers of varying thickness up to SijOO feet Home nf these t flows are so recent that hot springs still I exist mai i thorn I Probably none of Diem are eailler Ihnn the Urtlary The Fame kind of sheet Hows of basalt formed Ihe I Snakr plains between Ih use and Iocalello I ami are peculiar In I I Ihe Snake rlvrr regions nf I Idaho Oregon and t Washington One of these Hows from the Kagle valley I mountains filled I up the valley i of Ihe I Snulce a it least IdflO feet deep changed Its I course and com porcl It to eat out IL new channel tut ting away the schist along the I eastern side of tin basalt 1 which Is now the Snake river canyon Another L such Hnw from UK I ill oi horn oncl of the Seven T Islls cut niT the lower six miles of I IiS Hapld ri sir valley when then I emplierl Into the Salmon river and lllled II up some 3 100 < feet deep forcing the river to cut its way eastward sumo three miles till II emptred Into the Little Sal j j mon through the schist The damming I I of Ihe Snake below Iltmtlnglon formed I I a vast lake st hose llmttn cMendcd far mlii I Oregon and l southern Idaho I reached as far north as Council Ida and extended eastward some distance luyond Holso The shores of this t lake were covered with ranU vegetation composed of forests of willow cottonwoods cotton-woods maples etc The waters were mill and deposited very much clay and sand In beds and in places extensive I areas of tripoli uijd pipe clay Many Hows of basalt occurred while the t lake existed ami probably a Cow afler Ihe Snake had cut Its canyon and HO drained the lake rniANiT CONTACT The grit ni to Oil ttit with I the schist runs near the I crest of the range and u III tIe east of north and with a few exceptions ex-ceptions Is entirely I barren of pay mineral min-eral Near this contact however cither In I the granite or i the I schist are located I all the I large deposits I of pay mv except In I lie I Vaughn Uiver I Juten Me If I 1 we take a single region i il I is almost I Impossible to discover the cause of the miiicrallzalliMi but if we tilcb I ill the I dlstrkts logelhci It I is not Ii difficult to Iln a cause or causes Wo rind that I nearly all I I Ihe I veins l run oust of noith I that I they cannot be liacpd fir any great distance i niillmiousdy that all Ihe i ore and gunguc occur In I chulcs I ihut I outcrops nf porphyry can be traced fin short distances only In I the vkinlt > of some of the leading mines iiitirely disappear dis-appear I fIt ii liti on and again cmp up beyond These fads in connection St ii IiI the Ii-I characler nf the gaingue lead us to sav that I Uio t nilnerullvullnii I of ihc veins In I his I region occurs In lines parallel wilh i he granite contact or In series of parallel veins with occasional cross veins and that t these I veins have lnen formed at I different I times t I and by different dif-ferent agencies Tlu re are two distinct series of veins In I the Nchisl those I parallel with the granile contact und those intrsiracl I I lIed with the schist The hitler are always al-ways composed of white quartz I are of I varying I thickness h rarely over four fi Ire I I-re as crooked as rains horns and f mi I tod in I nil I I sorts of wnys They occasionally I oc-casionally I carry gold in rich pnrkuta of small slc ind nix probably simply cases of induration I I i i 1 They never Ii ni Set my Se-t porphyiy with I them hut often have consid rable inlcaclous inm The North Star I i nl Ihe head of Rapid rlvJr Is one of lliosic I mines The schist veins parallel I wilh i I the I conlut I and probably exist ill through I I lie si lust bill cannot be tiaeed much I beyond the I Snake because < > t ihe I continuous con-tinuous basaltic cap there 1 The Vaughn Is one of the mines and has a gnat outcrop of Ironquaitz gangue ir connection con-nection with i t a largi porphyry outcum The Rnvr Queen Is OP annihr vein parallel I wlti and north and oast of the I Vaughn but has little I Iron and no por phyry as yd thoiiffh It will be found oveniually 1 h Uoth of these aie copper sulphide veins St ith tUmrU or iron I quarU gangue and both arc Isolated I cbules There are a number of other similar outcrops west of Uuth bcrg and Cuiiruni Til UKK SERiES At Ruthberg are three I distinct scries of veins of different mineralisation Thty are lronquamcopper veins In schlsl sh I serleud I iou flialigitneite ciuarti veins In quartzporphyry and garneteopiiMlron veins In granile The schist veins arts like I I those men j tinned above and so fa > nothing I bos j bet done wild I licm They lie near the river j The quarlporphvry I Vlns are large < and an more continuous I and regular i han any 11 IbIS The area of I lies veins is large but t II i I also runs east of J north Is culled I qtuirlallc I locally and I Is embraced in a region half a mile I j wide Tinre m several parallel veins j Uuthbeig IB nearly In lie center of this area Years ago much work was done Ion I-on these veins and a mill was erected j for treating I the oieo but the presence of manganese made the attempt a failure fail-ure So far little lead has been found though some highgrade galena ban re cently been opened In tho AlllsonHou ahnn mine The manganese has been too much mixed with Iron and quarU to be i of saute i lifl rue garnetgranite veins lie practl I cally on the ereot of that granjte and near Ihe frcst of tho range They are characterlard by rather heavy outcroppings outcrop-pings of brown or yellow giirnc chutes cai yinjj Iron copper and some gold and sliver There are several parallel series of chutes and a number of apparent appar-ent crossveins Tin principal I outcrop aie the Queen anil the I Railroad mines 1l Tile l former Is in granite and the latter In lime and granite There Is no well ddlned porphyry in any of the granite veins but there Is inuch decomposed 1 and altered granite some of it upI proaching up-I yellow porphyry Among the crossveins are the Sunday group tI nnd t the Crackcrjack the latter entirely unopened On the eastern side of Cuddy mountain I moun-tain t and several miles northeast of the Queen there seems lo bo another area Co of quartzporphyry adjoinintr the I fiSt ern side of I the granite In which a little ore j has recently been found |